What is the meaning of Qualifier?

One who qualifies for something, especially a contestant who qualifies for a stage in a competition.

A preliminary stage of a competition.

A word or phrase, such as an adjective or adverb, that describes or characterizes another word or phrase, such as a noun or verb; a modifier; that adds or subtracts attributes to another.

A marker that qualifies or modifies another code element.

to qualify (to compete successfully in some stage of a competition and become eligible for the next stage)

to characterize, to consider [with direct object ‘someone/something’ and de (+ object or adjective) ‘as something’]

to call, to label [with direct object ‘someone’ and de (+ object or adjective) ‘as something’]

to call oneself [with de (+ copulative noun) or direct copulative noun ‘by a title’]

to characterize (to be characteristic of)

Source: wiktionary.org